yeast
I know I'm like 10 years late but the first country to be discovered is believed to be san Marino, which is also one of the worlds smallest country.
greece
England
england
Mangoes were first discovered in northeastern India, also in Bangladesh and Myanmar.
Actually yeast was discovered by the Egyptians, so they got it from Egypt.
Coffee was first discovered in Ethiopia.
They were first discovered in China
Great Britain
Neodymium was discovered in 1885 by Carl Auer von Welsbach in Austria.
The ancients discovered it but the date and country is unknown; probable in the Middle East, approx. 10 000 years ago.